MS Dual Strike Hack Help Needed

[Neverending Project]

I am trying to wire up the Dual Strike to a yoke as shown in various links on the wiki. I have the X and Y axis pots wired correctly, but I can't seem to make the buttons function. I realize that there are some common grounds between the A, B, C and D buttons, but I would think I would get two of them wired independently - either the A and C or the B and D. I have four buttons, and would like to wire them all separately. Here is the picture I used:

I wired one microswitch to the A/B Button lead (shown above) with the common wired to the B/D Common lead. I wired another microswitch to the C/D Button lead with its common wired to the A/C Common lead. This should give me buttons B and C, right? And I wired a microswitch to the Right Trigger and Right Trigger Common. For the left trigger, I used this picture:


But only one of the buttons works correctly. I am sure I have a ground/common problem. Can anyone help? In the end, I want 4 switches wired so they can work independently.

Thanks.